Created attachment 216957 [details]
Example program to reproduce the issue

Hi all,

I found this bug whilst working on a GUI application on Debian Squeeze. The bug manifests itself when editing a text field in a row containing at least one text column and a toggle button.

What happens is that when setting the GtkTreeViewColumn "sizing" attribute to GTK_TREE_VIEW_COLUMN_AUTOSIZE, editing one of the text fields causes a bogus "toggle" signal to be sent to a toggle button on the same row. This caused us an issue as we used the toggle button as a quick way of deleting a row within our application, and so as people were editing text fields, the row would completely disappear.

In order to reproduce:

- Compile the attached mcatest.c file and run it
- Verify that clicking on the toggle button causes a message to appear on stderr
- Click on the text "Column3" in the row under "Textcol3" as if you were about to edit the row
- Now click directly on the text "Column1" under "Textcol1"
- Verify that the toggle message unexpectedly appears on stderr

It is possible to see that it is the "sizing" attribute that causes this by simply swapping around the lines beginning "g_object_set(colX_column..." with their commented version for each column and recompiling. Now repeating the test shows that the bogus "toggle" signal is no longer sent, which is the expected behaviour.


ATB,

Mark.